Abstract: A method of for issuing a radio frequency (RF) card key of an authentication server is disclosed. The method includes receiving an encrypted serial number of a smart card from a mobile terminal, decrypting the encrypted serial number, extracting an RF card key corresponding to the decrypted serial number, encrypting the RF card key, and transmitting the encrypted RF card key to the mobile terminal.

Abstract: A method of sharing a function between terminals is disclosed. A method of sharing a screen in real-time during a chat between terminals may include: transmitting, by a first terminal, a message requesting a real-time screen sharing and chatting while performing a chat with a second terminal; displaying, by the first terminal, an output message indicating start of the real-time screen sharing and chatting when the second terminal is available for the real-time screen sharing and chatting, and when a response message accepting the request for the real-time screen sharing and chatting is received from the second terminal; and sharing, by the first terminal, an image displayed on a screen of the first terminal with the second terminal in real-time, and translucently displaying a chat window that overlaps the shared image and thereby displays a chat content.

Abstract: A terminal for actively providing information based on communication contents of a communication session. The terminal comprises a display unit that divides at least one of a schedule, Apps, REC, information regarding a matter of interest, and a contact into categories and displays, according to the categories, at least one of information regarding a communicator's matter of interest, schedule-related information, address book information corresponding to name information within a subscriber address book, first information relating to Apps within the subscriber terminal, and one or more App driving icons corresponding to the first information that are extracted from communication contents for at least one of a subscriber and a communication opponent in the communication session.

Abstract: A terminal for actively providing information based on communication contents of a communication session. The terminal comprises a display unit that divides at least one of a schedule, Apps, REC, information regarding a matter of interest, and a contact into categories and displays, according to the categories, at least one of information regarding a communicator's matter of interest, schedule-related information, address book information corresponding to name information within a subscriber address book, first information relating to Apps within the subscriber terminal, and one or more App driving icons corresponding to the first information that are extracted from communication contents for at least one of a subscriber and a communication opponent in the communication session.

Abstract: A method of sharing a function between terminals is disclosed. A method of sharing a screen in real-time during a chat between terminals may include: transmitting, by a first terminal, a message requesting a real-time screen sharing and chatting while performing a chat with a second terminal; displaying, by the first terminal, an output message indicating start of the real-time screen sharing and chatting when the second terminal is available for the real-time screen sharing and chatting, and when a response message accepting the request for the real-time screen sharing and chatting is received from the second terminal; and sharing, by the first terminal, an image displayed on a screen of the first terminal with the second terminal in real-time, and translucently displaying a chat window that overlaps the shared image and thereby displays a chat content.

Abstract: A method of for issuing a radio frequency (RF) card key of an authentication server is disclosed. The method includes receiving an encrypted serial number of a smart card from a mobile terminal, decrypting the encrypted serial number, extracting an RF card key corresponding to the decrypted serial number, encrypting the RF card key, and transmitting the encrypted RF card key to the mobile terminal.

Abstract: A dual wireless fidelity (WiFi) apparatus for wireless Internet that may perform installation, maintenance, management, or the like of a WiFi access point (AP) by using a mobile communication relay system more efficiently, and a wireless Internet system using the dual WiFi apparatus for wireless Internet. The dual WiFi apparatus includes: a signal inputting unit comprising a plurality of input ports for inputting a plurality of mobile communication signals, respectively, and an input port for inputting an Ethernet signal; a signal converting unit for converting the inputted Ethernet signal into a plurality of WiFi signals; a signal coupling unit for coupling the plurality of inputted mobile communication signals to the plurality of WiFi signals converted by the signal converting unit, respectively; and a signal outputting unit for outputting a plurality of coupled signals coupled by the signal coupling unit through a plurality of output ports, respectively.

Abstract: A three-level inverter having two direct current (DC)-links for converting DC voltages generated in a plurality of photovoltaic (PV) modules into alternating current (AC) voltages, wherein one end of a first DC-link of the two DC-links is connected to a first potential point at which a first potential is generated in the plurality of PV modules, and one end of a second DC-link of the two DC-links is connected to a second potential point at which a second potential that is lower than the first potential is generated in the plurality of PV modules, and both the other end of the first DC-link and the other end of the second DC-link are connected to a third potential point at which a third potential having a medium level between the first potential and the second potential is generated in the plurality of PV modules.

Abstract: The WiFi apparatus for wireless Internet includes: a signal inputting unit including a plurality of input ports for inputting a plurality of mobile communication signals, respectively, and an input port for inputting an Ethernet signal; a signal converting unit for converting the inputted Ethernet signal into a plurality of WiFi signals; a signal coupling unit for coupling the plurality of inputted mobile communication signals to the plurality of WiFi signals converted by the signal converting unit, respectively; a signal outputting unit for outputting a plurality of coupled signals coupled by the signal coupling unit through a plurality of output ports, respectively; and a coupler for allowing each of signals outputted from the signal outputting unit to be split with different phase differences and to be outputted.

Abstract: The WiFi apparatus for wireless Internet includes: a signal inputting unit including a plurality of input ports for inputting a plurality of mobile communication signals, respectively, and an input port for inputting an Ethernet signal; a signal converting unit for converting the inputted Ethernet signal into a plurality of WiFi signals; a signal coupling unit for coupling the plurality of inputted mobile communication signals to the plurality of WiFi signals converted by the signal converting unit, respectively; a signal outputting unit for outputting a plurality of coupled signals coupled by the signal coupling unit through a plurality of output ports, respectively; and a coupler for allowing each of signals outputted from the signal outputting unit to be split with different phase differences and to be outputted.

Abstract: A dual wireless fidelity (WiFi) apparatus for wireless Internet that may perform installation, maintenance, management, or the like of a WiFi access point (AP) by using a mobile communication relay system more efficiently, and a wireless Internet system using the dual WiFi apparatus for wireless Internet. The dual WiFi apparatus includes: a signal inputting unit comprising a plurality of input ports for inputting a plurality of mobile communication signals, respectively, and an input port for inputting an Ethernet signal; a signal converting unit for converting the inputted Ethernet signal into a plurality of WiFi signals; a signal coupling unit for coupling the plurality of inputted mobile communication signals to the plurality of WiFi signals converted by the signal converting unit, respectively; and a signal outputting unit for outputting a plurality of coupled signals coupled by the signal coupling unit through a plurality of output ports, respectively.

Abstract: Provided are a device for setting a service zone for a predetermined zone-based service provided by a mobile communication system for at least one mobile communication unit to which a mobile communication service is provided by the mobile communication system, the device comprising a local area wireless communication unit, wherein the local area wireless communication unit performs local area wireless communication with the mobile communication unit and the device sets a range in which the local area wireless communication is available as the service zone of the mobile communication unit, a method and a system for providing a zone-based service using the device, and a mobile communication unit for providing the zone-based service.

Abstract: A beam switching antenna method and apparatus for controlling a beam switching antenna system including an antenna element for forming a beam, at least one conductive reflector for reflecting the beam, and a ground switch for applying a reference voltage to the least one conductive reflector, the method including selectively configuring the beam switching antenna system for a current-directional beam pattern to receive a first signal and for a non-directional beam pattern to receive a second signal; comprising the first and second signals; and controlling, using the ground switch; the beam based on the comparison of the first and second switching.

Abstract: A beam switching antenna method and apparatus for controlling a beam switching antenna system including an antenna element for forming a beam, at least one conductive reflector for reflecting the beam, and a ground switch for applying a reference voltage to the at least one conductive reflector, the method includes forming the beam of the antenna element, and imparting the formed beam with a predetermined beam pattern by controlling the ground switch to apply the reference voltage to at least one conductive reflector.

Abstract: A small-sized Integrated Radio Frequency Type Repeater includes first and second Service (transmitting) Antennas, a Junction circuit part with RF type (200) which plays the role of relay, a Shield Box (400) which protects the first and second Service Donor (receiving) Antennas (310, 320) and a Junction circuit part (200) installed inside of the same body. (Cover) (500). The first Service (transmitting) Antenna (110) and the first Donor (receiving) Antenna (310) attached to opposite sides of the Shield Box (400) and the second Service Antenna (120) is separated from the first Service (transmitting) Antenna (110) between the inside of Cover (500) and the first Service (transmitting) Antenna (110), and the second Donor (receiving) Antenna (320) is installed to be separated from the first Donor (receiving) Antenna (310) between the inside of the Cover (500) and the first Donor (receiving) Antenna (310).

Abstract: Provided are a device for setting a service zone for a predetermined zone-based service provided by a mobile communication system for at least one mobile communication unit to which a mobile communication service is provided by the mobile communication system, the device comprising a local area wireless communication unit, wherein the local area wireless communication unit performs local area wireless communication with the mobile communication unit and the device sets a range in which the local area wireless communication is available as the service zone of the mobile communication unit, a method and a system for providing a zone-based service using the device, and a mobile communication unit for providing the zone-based service.

Abstract: A system for providing banking services by use of a mobile communication system, in which a variety of financial transactions including inquiry of at least one financial account of at least one financial institution, transfer and remittance, and loan and its interest payment are processed by the mobile communication system. The system includes: the mobile communication system, provided with an integrated circuit (IC) card and a memory device to which a banking application is installed, for transmitting and receiving data by wireless, the IC card being stored with information on a personal identification number (PIN) and information related to financial accounts including a loan account.